1997 Mercedes Benz 200e Mis firing

1997 MERCEDES BENZ 200E
128,000 MILES • 4 CYL • 2WD • AUTOMATIC
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DOUGSOLV
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  • 2 POSTS
My merc is mis firing normally at low revs. Could it be a worn plug or a sensor or something else.
May 13, 2009 at 4:49 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
May 13, 2009 at 5:53 PM
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